2642: Difference between revisions

Latest revision as of 03:23, 11 September 2023

Tektronix 2642
200 kHz Fourier Analyzer Tektronix 2642 Produced from 1991 to 1995 Manuals Tektronix 2642A Reference Manual Tektronix 2642A Service Manual Tektronix 2642 Introduction Spec Tektronix 2642A Final Spec (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 2642A is an FFT analyzer with a DC to 200 kHz frequency range. It performs signal acquisition and processing, and uses a PC running MS-DOS connected via a serial port for mass storage and graphics.

It has two or four inputs with dedicated 12-bit (optionally 16-bit) ADCs, and an optional arbitrary function generator. Another option is a "zoom" feature that provides a span as small as 10 Hz about the frequency of interest.

Key Specifications

Frequency range	DC to 200 kHz
Real-time bandwidth	100 kHz max. (single channel autospectrum with fast additive averaging, display off, 2048 point frame size)
Dynamic range	75 dB, extended to 90 dB with Opt. 16 or 17 (16-bit ADCs)
Channels	2 (optionally 4), matched ±0.075 dB (DC to 50 kHz)
Transient Capture	500 K Samples, extended to 3.5 M with Opt. 6M (6 MB)
FFT performance	32-bit floating point FFT, 64 tp 4096 points
Spectral Lines	25 to 1600
Input Impedance	1 MΩ // 200 pF
Max Input Level	±30 V
Weight	Standard accessories: 12.3 kg (27 lbs)
Power	90 − 250 V_AC, 48 to 66 Hz, >120 W
Connections	Front panel: CH1-CH4 inputs, BNC connector; Signal generator output BNC connector (50 Ω; ±10 V); Rear panel: SYSTEM INTERCONNECT, male DB9 (TTL-level inputs; pin 1 trigger input, pin 2 trigger sense output, pin 3 external clock input; pins 6–8 signal ground, pin 9 external sampling input); SERIAL PORT, female DB9 to connect PC

Options

Opt. 1H: Four Input Channels
Opt. 16: Two 16-Bit Input Channels
Opt. 17: Four 16-Bit Input Channels
Opt. 6M: Large Data Memory (add 6 MB)

Software

DOS software and applications for 2622, 2630, 2641 and 2642

Internals

The 2642 uses a National NS32CG160 32/16-bit CPU and an AT&T DSP32C Digital Signal Processor.

Pictures

Tek 2642A CPU Board
Tek 2642A CPU Board
Tek 2642A CPU Board
Tek 2642A CPU Board
Tek 2642A CPU Board
Tek 2642A Channel Controller Board
Tek 2642A Channel Controller Board
Tek 2642A Channel Controller Board
Tek 2642A Channel Controller Board
Tek 2642A Channel Controller Board

@@ Line 2: / Line 2: @@
 |manufacturer=Tektronix
 |model=2642
-|class=Fourier Analyzer
+|class=Spectrum Analyzer
 |summary=200 kHz Fourier Analyzer
 |image=Tek_2642a_7.jpg
@@ Line 9: / Line 9: @@
 |discontinued=1995
 |manuals=
-* [[Media: 070-8403-01.pdf| Tektronix 2642A Reference Manual (PDF)]]
+* [[Media:070-8403-01.pdf| Tektronix 2642A Reference Manual]]
-* [[Media: 070-8693-00.pdf| Tektronix 2642A Service Manual (PDF)]]
+* [[Media:070-8693-00.pdf| Tektronix 2642A Service Manual]]
-* [[Media: Tek_2600_Series_Catalog_1991.pdf| Tektronix 2642 Introduction Spec (PDF)]]
+* [[Media:Tek_2600_Series_Catalog_1991.pdf|Tektronix 2642 Introduction Spec]]
-* [[Media: Tek_2600_Series_Catalog_1994.pdf| Tektronix 2642A Final Spec (PDF)]]
+* [[Media:Tek_2600_Series_Catalog_1994.pdf|Tektronix 2642A Final Spec]]
 }}
-The '''Tektronix 2642A''' is a Fourier analyzer that links dedicated signal acquisition and analysis with a personal computer’s mass storage and graphics.  It allows measurement solutions for electrical, mechanical, and electromechanical applications in the DC to 200 kHz frequency range.  Typical applications are Structural Analysis, Control Systems, Machine Vibration, Audio and Acoustic Tests, and General Purpose Signal and System Analysis.
+The '''Tektronix 2642A''' is an [[wikipedia:Fast Fourier transform|FFT analyzer]] with a DC to 200 kHz frequency range.  It performs signal acquisition and processing, and uses a PC running MS-DOS connected via a serial port for mass storage and graphics.
-Each of the channel inputs provide simultaneous sampling of all channels utilizing 12 bit ADC standard or 16 bit ADC optionally.  Signal processing includes Fourier Transform (FFT) and Spectral Lines.  The signal generator has a wide variety of functions, like sine, square, sawtooth, triangle, input, random, adjustable random, chirp, and arbitrary.  With the optional TurboPac Application Library and Run-Time License advanced measurement calculations and graphs can be generated from the data collected.
+It has two or four inputs with dedicated 12-bit (optionally 16-bit) ADCs, and an optional arbitrary function generator.  Another option is a "zoom" feature that provides a span as small as 10 Hz about the frequency of interest.
-The PC’s monitor displays the measurements results – but that’s where the Fourier Analyzer dependence on the PC stops.  All of the data acquisition, data management, signal processing and other computationally intensive operations are reserved for the Fourier Analyzer’s high-performance measurement and analysis hardware.  Built-in analog and digital anti-alias filters automatically track all of the bandwidth settings.  A selection of frame sizes allows the user to choose the best trade-off between acquisition time and frequency resolution.  When high frequency resolution around a specific signal is needed, the option "zoom" feature can be used.  It allows one to focus up to 1600 spectral line with a span as small as 10 Hz about the frequency of interest.
-To learn more about FFT read '''[[wikipedia:Fast_Fourier_transform|Fast Fourier transform]]''' on at https://en.wikipedia.org/wiki/Fast_Fourier_transform.
-Front panel inputs/outputs are: CH1, CH2, CH3, and CH4 each with a [[BNC connector]] (1 MΩ; 200 pF; ±30 V); and OUTPUT [[BNC connector]] (50Ω; ±10 V; signal general output capable of a variety of pre-defined, as well as user-defined, signals.)
-Rear panel inputs/outputs are: SYSTEM INTERCONNECT [[DB9 connector]] (Male connector used for both External triggering, and External sampling inputs.  All pins TTL-level except Signal ground: Pin 1 triggering signal input; pin 2 trigger sense output; pin 3 external clock input; pins 6 thru 8 signal ground; pin 9 is the external sampling input); and SERIAL PORT [[BNC connector]] (Female connector used linking to the host computer via a Tektronix supplied serial interface cable).
----------------------------------------------------------
-<div style='text-align: center;'>Specifications based on 1994 published documentation, unless otherwise specified.</div>
 {{BeginSpecs}}
-{{Spec | Frequency Ranges | DC to 200 kHz }}
+{{Spec | Frequency range     | DC to 200 kHz }}
-{{Spec | Max Real-time Bandwidth | 100 kHz }}
+{{Spec | Real-time bandwidth | 100 kHz max. (single channel autospectrum with fast additive averaging, display off, 2048 point frame size) }}
-{{Spec | Dynamic Range | 75 dB, extended to 90 dB with Opt. 16 or 17 }}
+{{Spec | Dynamic range       | 75 dB, extended to 90 dB with Opt. 16 or 17 (16-bit ADCs)}}
-{{Spec | Standard Channels | 2 }}
+{{Spec | Channels            | 2 (optionally 4), matched ±0.075 dB (DC to 50 kHz) }}
-{{Spec | Max Channels | 4 }}
+{{Spec | Transient Capture   | 500 K Samples, extended to 3.5 M with Opt. 6M (6 MB) }}
-{{Spec | Channel Match | ±0.075 dB (DC to 50 kHz) }}
+{{Spec | FFT performance     | 32-bit floating point FFT, 64 tp 4096 points }}
-{{Spec | Transient Capture Samples | 500 K, extended to 3.5 M with Opt. 6M (6 MB) }}
+{{Spec | Spectral Lines      | 25 to 1600 }}
-{{Spec | Spectral Lines | 25 to 1600 }}
+{{Spec | Input Impedance     | 1 MΩ // 200 pF }}
-{{Spec | Input Impedance | 1 MΩ; 200 pF }}
+{{Spec | Max Input Level     | ±30 V }}
-{{Spec | Max Input Level | ±30 V }}
+{{Spec | Weight              | Standard accessories: 12.3 kg (27 lbs) }}
-{{Spec | Included Accessories | User Guide; Instrument Program Software; System Simulator Box; Power Cord; and Serial Interface Cable (please specify) }}
+{{Spec | Power               | 90 − 250 V<sub>AC</sub>, 48 to 66 Hz, >120 W }}
-{{Spec | Weight | Standard accessories: 12.3 kg (27 lbs) }}
+{{Spec | Connections |
-{{Spec | Power | 90 − 250 V<sub>AC</sub>, 48 to 66 Hz, >120 W }}
+Front panel: CH1-CH4 inputs, [[BNC connector]]; Signal generator output [[BNC connector]] (50 Ω; ±10 V);<br />
-{{Spec | Operating Atmospherics | Temperatures: 0 °C to +50 °C; Humidity: 95% for five days; Altitude: Up to 4.8 km (15,000 ft) }}
+Rear panel: SYSTEM INTERCONNECT, male [[DB9 connector|DB9]] (TTL-level inputs; pin 1 trigger input, pin 2 trigger sense output, pin 3 external clock input; pins 6–8 signal ground, pin 9 external sampling input);<br />
+SERIAL PORT, female [[DB9 connector|DB9]] to connect PC
+}}
 {{EndSpecs}}
@@ Line 52: / Line 44: @@
 ==Software==
 * [[Media:Tektronix-2622,2630,2641,2642,Software_and_app._utilies_for_Tek_26xx_Fourier_Analyzer_2.26-2600.zip|DOS software and applications for 2622, 2630, 2641 and 2642]]
+==Internals==
+The 2642 uses a National NS32CG160 32/16-bit CPU and an AT&T DSP32C Digital Signal Processor.
 ==Pictures==
 <gallery>
@@ Line 64: / Line 59: @@
 Tek_2642a_9.jpg
 Tek_2642a_10.jpg
+Tek 2642a cpu board 1.jpeg|Tek 2642A CPU Board
+Tek 2642a cpu board 2.jpeg|Tek 2642A CPU Board
+Tek 2642a cpu board 3.jpeg|Tek 2642A CPU Board
+Tek 2642a cpu board 4.jpeg|Tek 2642A CPU Board
+Tek 2642a cpu board 5.jpeg|Tek 2642A CPU Board
+Tek 2642a channel controller board 1.jpeg|Tek 2642A Channel Controller Board
+Tek 2642a channel controller board 2.jpeg|Tek 2642A Channel Controller Board
+Tek 2642a channel controller board 3.jpeg|Tek 2642A Channel Controller Board
+Tek 2642a channel controller board 4.jpeg|Tek 2642A Channel Controller Board
+Tek 2642a channel controller board 5.jpeg|Tek 2642A Channel Controller Board
 </gallery>
 [[Category:Spectrum analyzers]]
 [[Category:Manual needed]]